1: Is there a way to put a percussion staff on your score? and 2: where can I find a list of which notes equal which sound?
1) Yes. See the sample file: Carmen.nwc Use Score Review (http://www.noteworthysoftware.com/nwc2/help/MNU_SCOREREVIEW.htm) and notice the transpositions.
2) See the sample file: Drumref.nwc
This Search (http://www.noteworthysoftware.com/search.php?term=percussion) has some useful links.